<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="lib/vue.js"></script>
</head>
<body>
    <div id="root">
        {{ title }}
        <my-header></my-header>
        <my-footer></my-footer>
    </div>
</body>
<script>
    Vue.component('my-header', {
        template: '<header>header</header>'
    })
    new Vue({
        el: '#root',
        data: {
            title: 'hello'
        },
        components: {
            'my-footer': {
                template: '<footer>footer</footer>'
            }
        }
    })
</script>
</html>